<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>分区元素</title>
</head>
<body>
<div class = "header">头部</div>
<div class = "footer">尾部部</div>
<div class = "main">主体部</div>
<div class = "nav">导航</div>
<div class = "aside">侧边栏</div>
<div class = "article">文章</div>
<div class = "section">区域</div>
<hr>
<header>头部</header>
今晚天气很<span style="color: red;"  >热</span>

</body>
</html>